Quartz PDFContext

[lpyam24]

Can someone please explain to me what Quartz PDFContext means regarding a PDF that is saved on my Mac?
I have circled it in the attachment

 

[KALLT]

It means that this is the library, or a component of it, that “created” (encoded, drew, rendered, converted, etc. – whichever term makes most sense) the PDF file. macOS has native support for PDF creation that apps like Preview, Safari, Pages, etc. can use to create PDF files. Quartz is the name given to a collection of Apple's graphics APIs.